Allow more PATH tools, expose HOST_STRIP

atree was using the host's strip tool during sdk generation, so expose
the prebuilt for use instead.

`id` was used with a test running minijail0 during the build

`sha1sum` is used by development/build/tools/mk_sdk_repo_xml.sh

`rmdir` was being used to remove some tmp files

Test: m PRODUCT-sdk_arm64-sdk dist sdk_repo
Test: Run other builds through forrest
Change-Id: I49c756a3e9497c0bbd9030754e6aa193a2d989a4
diff --git a/ui/build/paths/config.go b/ui/build/paths/config.go
index 548b038..f044971 100644
--- a/ui/build/paths/config.go
+++ b/ui/build/paths/config.go
@@ -83,6 +83,7 @@
 	"head":      Allowed,
 	"hexdump":   Allowed,
 	"hostname":  Allowed,
+	"id":        Allowed,
 	"jar":       Allowed,
 	"java":      Allowed,
 	"javap":     Allowed,
@@ -104,11 +105,13 @@
 	"readlink":  Allowed,
 	"realpath":  Allowed,
 	"rm":        Allowed,
+	"rmdir":     Allowed,
 	"rsync":     Allowed,
 	"runalarm":  Allowed,
 	"sed":       Allowed,
 	"setsid":    Allowed,
 	"sh":        Allowed,
+	"sha1sum":   Allowed,
 	"sha256sum": Allowed,
 	"sha512sum": Allowed,
 	"sort":      Allowed,